debug_print_backtrace

Prints a backtrace (PHP 5)
void debug_print_backtrace ( )

debug_print_backtrace() prints a PHP backtrace. It prints the function calls, included/required files and eval()ed stuff.

Parameters

This function has no parameters.

Return Values

No value is returned.

Examples

Example 591. debug_print_backtrace() example

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<?php
// include.php file

function a() {

    b();

}


function b() {

    c();

}


function c(){

    debug_print_backtrace();

}

a();

?>

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<?php
// test.php file

// this is the file you should run

include 'include.php';
?>

The above example will output something similar to:

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#0  eval() called at [/tmp/include.php:5]

#1  a() called at [/tmp/include.php:17]

#2  include(/tmp/include.php) called at [/tmp/test.php:3]


#0  c() called at [/tmp/include.php:10]

#1  b() called at [/tmp/include.php:6]

#2  a() called at [/tmp/include.php:17]

#3  include(/tmp/include.php) called at [/tmp/test.php:3]

See Also

debug_backtrace()

Code Examples / Notes » debug_print_backtrace

aidan

This functionality is now implemented in the PEAR package PHP_Compat. More information about using this function without upgrading your version of PHP can be found on the below link: http://pear.php.net/package/PHP_Compat

bortuzar

If you want to get the trace into a variable or DB, I suggest to do the following: <?php ob_start(); debug_print_backtrace(); $trace = ob_get_contents(); ob_end_clean(); $query = sprintf("INSERT INTO EventLog (Trace) VALUES ('%s')", mysql_real_escape_string($trace)); mysql_query($query); ?>

taner

bortuzar: a simpler version, w/o output buffering: <?php $query = sprintf("INSERT INTO EventLog (Trace) VALUES ('%s')", mysql_real_escape_string(join("\n", debug_backtrace())) ); mysql_query($query); ?>

petermarkellis

A cleaner example: <?php function a() { b(); } function b() { c(); } function c(){ debug_print_backtrace(); } a(); ?> outputs: #0 c() called at [C:\debugbacktracetest.php:7] #1 b() called at [C:\debugbacktracetest.php:3] #2 a() called at [C:\debugbacktracetest.php:14]

debug_print_backtrace

Prints a backtrace (PHP 5) void debug_print_backtrace ( )

Parameters

Return Values

Examples

Example 591. debug_print_backtrace() example

Code Examples / Notes » debug_print_backtrace

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Prints a backtrace (PHP 5)
void debug_print_backtrace ( )